High-Performance Socket.IO v4 Server Built Purely in Go

import { io, Socket } from "socket.io-client";
import { useEffect, useState } from "react";

// Initialize client (or use "https://gsocket-telemetry.onrender.com" for live demo)
export const socket: Socket = io("https://gsocket-telemetry.onrender.com", {
  transports: ["websocket", "polling"],
  reconnection: true,
  reconnectionDelay: 1000,
  auth: {
    token: "your-jwt-auth-token",
    userId: "user_123"
  }
});

// React Hook Example
export function useChatRoom(roomName: string) {
  const [messages, setMessages] = useState<Array<{ user: string; text: string }>>([]);

  useEffect(() => {
    socket.on("connect", () => {
      console.log("Connected to gsocketio server:", socket.id);
      // Join targeted room
      socket.emit("join_room", roomName);
    });

    socket.on("new_message", (msg) => {
      setMessages((prev) => [...prev, msg]);
    });

    socket.on("connect_error", (err) => {
      console.error("Connection rejected:", err.message);
    });

    return () => {
      socket.emit("leave_room", roomName);
      socket.off("new_message");
      socket.off("connect");
    };
  }, [roomName]);

  const sendMessage = (text: string) => {
    socket.emit("send_message", { room: roomName, text, user: "Alice" });
  };

  return { messages, sendMessage };
}